Pressure carburetors



March 25, 1958 J. A. BASCLE, JR 2,828,116

PRESSURE CARBURETORS Filed March 12, 1957 3 Sheets-Sheet l I rpdi j INVENTOR I H 3/ 1 IfO-SEPH A BAJCL E, J6.

ATTORNEYS March 25, 1958 J. A. BASCLE, JR I 2,828,116

PRESSURE CARBURETORS Filed March 12, 1957 3 Sheets-Sheet 2 IN VENTOR JbJfP/i A 5195615, -Jz

March 25, 1958 J. A. BASCLE, JR I 2,828,116

PRESSURE CARBURETORS Filed March 12, 1957 3 Sheets-Sheet 3 f "rid.

INVENTOR ATTORNEYS tlnited States Patent PRESSURE CARBURETORS Joseph A. 'Bascle, Jr., Toledo, Ohio 7 Application March 12, 1957, Serial No. 645,621

Claims. ((11. 261-44) The present invention relates to pressure carburetors and more particularly to an automatic pressure carburetor provided with a novel air valve which controls :the metering of fuel to the carburetor.

It is another object of this invention .to provide an automatic pressure carburetor having an .air valve in the carburetor tube which operates a diaphragm regulator in the carburetor fuel line.

It is another object of this invention .to provide an automatic pressure .carburetor having an air valve with cup-like projections slidable in the carburetor tube and tensioned by means of a spring or other restraining device.

It is another object of this invention to provide an improved automatic pressure .carburetor :having .an air valve slidable in the carburetor tube and having a tension means connected therefrom to the engine throttle.

It is a further object of this invention 10 .provide an improved automatic pressurecarburetor having a slidable air valve with cup-like projections within :the carburetor tube, said air valve operating fuel valve means in the fuel line to the carburetor, said air valve :in its movement masking and unmasking a series-of channels from the flow of carburetor air, said channels providing an area for the mixtureof-fuel and air; 7

It is another object of this invention to provide an automatic pressure carburetor 'having a :distinct fuel air mixture path separate from the main air volume entering the engine. g

It is another object of-this invention'toprovide a distinct fuel air mixture path separate and distinct from the main air-volume entering the engine-having mixing channels which extend or which may be engaged with channels which extend withintheinlet manifold.

It is another object of this invention to-provide an improved automatic pressure carburetor in which a slidable air valve is employed'to actuate a'fuel regulator metering process and at the sametime'to-variably mask and unmask a series of staged fuel air mixture channels from the flow of inlet air into the carburetor.

With theforegoing and other objects in view themvention will be more fully-described hereinafter and will be more particularly pointed out in the claims-appended hereto.

In the drawings whereinlike symbols refer to like or corresponding parts throughout the several views:

Figure 1 is a side viewcf ithe invention in :closed throttle position.

Figure 2 is a cross-sectional side view of the invention in closed throttle position.

Figure 3 .is a cross-sectional'side view of the invention in wide open throttle position.

Figure 4 is a top cross-sectional view of a part of the invention taken at AA in Figure 2.

Figure 5.is a'drawing of the 'slidable air valve forming a part of the invention.

Figure 6 is a disassembly view of the fuel and air mixture channels forming a part of the invention.

Figure 7 is a top plan view of the device of Figure 6.

Referring more particularly to these drawings, 1 represents .the upper body section and 3 the lower body section of the hollow carburetor tube. The air inlet is at 43 while the fuel line enters the carburetor body at 49 at the fuel regulator 26. Throttle valve lever 41 is attached to turn throttle valve 25. Compensating needle linkage 12 is pinned at one end to throttle valve lever 41 and at the other end to needle valve 24 such that needle valve 24 operates in cooperation with throttle 25.

Air valve 21 has a sliding fit within lower body section 3. Air valve suspension boss 10 extends through air valve travel slot 11. It is noted that there may be an air valve suspension boss 10 also on the reverse side of the air valve (not shown). Spring 28 engaging boss 10 supports air valve 2-1 in a vertically tensioned position. Air valve suspension cable 33 attached to the remaining end of spring 28 is strung over pulley 29 and thence to throttle lever 41 in such a manner that opening throttle 25 by means of throttle lever 41 decreases the spring tension supporting air valve 21.

Referring particularly to Figures 2 and 3, there is shown a lever 22 having a cammed section 22" to engage a spring loaded diaphragm plunger 23. Lever 22 is pinned at fulcrum '17. The remaining end of lever 22 is pinned to lever linkage 8. Linkage 8 in turn is pinned at boss -9 mounted upon air valve 21. When air valve 21 moves downwardly from the position shown in Figure 2 to the position shown in Figure 3, lever 22 compresses spring loaded diaphragm plunger 23 which in turn depresses diaphragm 20 of fuel regulator 26. Fuel regulator 26 comprises, in addition to diaphragm 20, a fuel regulator meter pin 13 attached thereto. "Fuel regulator metering pin 13 is movable within fuel regulator metering p0rt 1'4. Fuel enters the regulator at point 40 and must pass through port -14 before reaching fuel line 44. The fuel regulator thus designated at 26 is of the type more fully described in my 'U. S. Patents Nos. 2,- 523,550 and 2,664,279. Needle valve 24 is interposed in fuel line 44 and is operated in conjunction with throttle 25 as hereinbefore described. Fuel enters the carburetor tube proper by means of fuel line 44 through spring loaded nozzle tube 4 and nozzle part 5. Spring loaded nozzle tube 4 having a disc-like head is provided to reach inwardly through nozzle port 5 for the purposes of conveying fuel from upper body 1 into lower body 3 and also to act as a sealing agent between these latter two bodies.

It will be notedthat upper body 1 has been provided with a flattened surface 6 to correspond to and receive this means. Nozzle port 5 is provided in overhead bridge support 31 and air valvedisc roof 16 secured thereto by means of clamping bolts 34. Overhead bridge support 31 is in turn supported byoverhead bridge support post 18 to provide a minimumof impedance to the passage of air from air inlet 43 towards air valve 21. Air valve 21 is fabricated from light weight metal and iscylindrical in shape, having an opening at either end. Air valve -21 includes an outer shell also fabricated from light weight metal 21 which supports the boss 10. Outer shell 21 also has an opening at either end andas shown in Figure 3 is supported from air valve 21 by means of air valve spacing sleeves 21 soldered thereto. It is noted that spaces 30 are thus formed between valve 21 and outer shell 21*. These spaces 30 are in the form of cup-like projections which cause air valve 21 to be sensitive to the passage of air through the carburetor in response to pressure or suction vacuum influences.

asaane An enlarged clearance is provided at 19*. such that the air valve will be influenced from vacuum within the inlet manifold as well as air pressure from above. A lateral adjustment screw 2 is provided which is for the purpose of positioning upper body section 1 with respect to lower body section 3. Proper adjustment may be thus made of the-relative positions of cammed lever section 22 and spring loaded diaphragm plunger 23.

Referring particularly to Figure 3, there is shown at 27 a series of vanes or channel members 27 secured to overhead bridge support 31 and air valve disc roof 16 by means of clamping bolts 34. These vanes or channel members 27 are shown in more detail in Figure 6 and are in the form of hollow tubing having a spread disclike head on each vane or channel member. These disclike heads are spaced by means of spacers 34 upon clamping bolts 34. It is noted that each vane or channel member 27 has a larger cylindrical portion than the vane or channel member mounted immediately above it such that the cylindrical portions are nested within one another. The outermost vane or channel member is adapted to extend within the inlet manifold either of itself or by extension. A mixture of fuel and air takes place within the cylindrical portion of the innermost channel member for the length thereof and thence in surrounding channel members as they may extend beyond the innermost channel member. There is thus provided a fuel and air mixing channel separate from the mainflow of air into the inlet manifold of the engine.

It is seen from Figure 2 that in a closed throttle position, there being no air flow within the carburetor, the air valve 21 is in a fully raised position. It thus encloses channel members 27. As the throttle is opened an increasing supply of fuel and air is provided to the carburetor. The increased air flow and pressure forces air valve 21 in a downward direction, thus exposing channels or vanes 27 to an increasing degree as the throttle is opened wider. Thus it is seen that as the throttle is opened wider an increasing amount of air is supplied to the channel member or members wherein an initial mixture of air and fuel takes place. The air valve outer shell 21 is raised at points 19 to mask slots 11 in the lower body section during the sliding operation of the valve. A vacuum port 7 is introduced between the fuel regulator diaphragm 2% and the throttle valve 25 and is incorporated to function with the spring loaded diaphragm plunger 23 to stabilize the fuel pump pressures and achieve better mixtures for normal and severe operations.

In operation air enters the carburetor tube at 43 and proceeds around throttle 25 assuming the latter to'be in a partially open position. This air proceeds around and through air valve 21 to the engine inlet manifold. Fuel from regulator 26 proceeds past needle valve 24 in fuel line 44 towards nozzle port at the top of the carburetor. Due to air pressure and air flow in the carburetor-the air valve 21 will be partially displaced downward exposing one or more of the disc portions of channels 27. Air Will pass into the cylindrical portion of the innermost channel member and there mix with fuel from nozzle port 5. The fuel and air mixture will proceed in the cylindrical portion of the innermost channel member to point 45 inside the cylindrical portion of the second innermost channel member where the aforementioned mixture will mix with more air. It is noted that the latter channel member or subsequent channel members extend to within the inlet manifold at point 32. It is thus seen that a separate and distinct mixture path is provided within channel members 27 distinct from the main passage of air into the inlet manifold. The final mixture of fuel With'the entire mass of inlet air does not take place until point 32 within the inlet manifold, thus providing a better and surer mixture of fuel and air. The force with which this preliminary mixture is propelled to within the inlet manifold is regulated by the movement of air valve 21 pastthe disc-like portions of channel member 27. The

movement of air valve 21 is in turn governed by nlet air flow and. pressure as well as inlet manifold suction. Movement of air valve 21 meters fuel passing through regulator 26 by means of cammed lever 22 bearing upon spring loaded diaphragm plunger 23 as described above. Linkage 12 additionally causes needle valve 24 in fuel line 44 to cooperate with throttle 25 such that opening throttle 25 causes needle valve 24- to open wider. Fuel flows from line 44 through nozzle port 5 into the carburetor. It is seen that the carburetor functions automatically to provide for varying fuel and air requirements at different engine speeds and air pressures and without the usual venturi tube arrangement.

Not only is the flow of fuel directly controlled from the throttle by means of compensating needle linkage 12, but the flow of fuel also regulated by means of air valve 21 sensitive to atmospheric air pressure and flow. The invention thus provides a fuel metering mechanism to cooperate in conjunction with and proportional to the entry of atmospheric air pressure and flow into the engine. The invention provides a carburetor to accurately meter fuel at all engine speeds and loads as partially indicated by inlet manifold vacuum. Air valve suspension springs 28 are linked to and made to cooperate with throttle valve 25. This arrangement is directed at lowering the air valve resistance to incoming atmospheric pressure at full throttle position. Also a fuel air mixture is provided separate and distinct from the main volume of air-entering the inlet manifold. Subsequent mixing of fuel with the main body of air entering the engine takes place within the inlet manifold. The invention combines means and actions to achieve a cooperating air-fuel metering and air-fuel-channeling all pressure carburetor.

Although I have disclosed herein the best form of the invention known to me at this time, I reserve the right to all such modifications and changes as may come within the scope of the following claims.

What I claim is:

1. In a carburetor, a hollow cylindrical air pressure responsive valve slidable within said carburetor, a plurality of staged disc-channels supported by the casing of said carburetor within said slidable valve, whereby said disc-channels are successively unmasked by pressure differentials.

2. In a pressure carburetor having a tube located between a throttled air inlet and an inlet manifold, a hollow cylindrical air valve slidable within said tube including cup-like projections, a fuel regulator diaphragm, a lever cammed to operatively engage said diaphragm, said cammed lever being rotatably pinned to said air valve.

3. In a pressure carburetor having a tube joining an air inlet to an inlet manifold, an inlet throttle, a hollow cylindricalair valve slidable within said tube said valve including cup-like projections, a fuel nozzle port providing a fuel inlet to said tube disposed at the air inlet end of said tube, a fuel regulator diaphragm for metering the fuel supplied to said port, a lever cammed to depress said diaphragm, said lever being rotatably pinned to said air valve, a plurality of concentric hollow vanes extending from the proximity of said port and within said hollow air valve towards the inlet manifold, said vanes having inlet ends progressively further away from said port, whereby said inlet ends may be progressively uncovered by the movement of said air valve.

4. The apparatus as recited in claim 3 wherein said air valve sliding movement is restricted by means of at least a single spring member having one end thereof attached to said air valve.

5. The apparatus as recited in claim 4 wherein the remaining end of said spring member is operatively engaged with said inlet throttle to provide decreased restraining force on said air valve with the opening of said throttle.

6. In a pressure carburetor having a tube joining an air inlet and an inlet manifold, an inlet throttle, a hollow 5 cylindrical air valve slidable within said tube, said valve including cup-like projections,.a fuel nozzle port providing a fuel inlet to said tube disposed towards the hollow inlet end of said valve, a fuel regulator including a diaphragm, a fuel line joining said regulator and said port,

. a needle valve interposed in said fuel line, a lever to provide for depressing said diaphragm, said lever being rotatably pinned to said air valve, a plurality of concentric hollow vanes extending from the proximity of said port and within said hollow air valve towards the inlet manifold, said vanes having inlet ends progressively fur- [her away from said port, whereby said inlet ends may be progressively uncovered by the movement of said air valve, a spring operatively attaching said air valve to said throttle to provide decreased restraining force on said air valve with the opening of said throttle, and linkage means translating said needle valve concurrent with throttle movement.

7. In a pressure carburetor having a tube located between a throttled air inlet and an inlet manifold, a hollow cylindrical air valve slidable within said tube including cup-like projections, a fuel line, a fuel regulator interposed in said fuel line, said fuel regulator including a diaphragm and a valve operated by said diaphragm, a lever cammed at one end thereof to engage a linkage translating said diaphragm, said lever being rotatably pinned to said slidable air valve.

8. In a pressure carburetor having a tube joining an air inlet to an inlet manifold at right angles thereto, an inlet throttle, a hollow cylindrical air valve slidable within said tube towards said inlet manifold, said valve including cup-like projections, a fuel nozzle port providing a fuel inlet to said tube disposed toward the hollow inlet end of said valve, a fuel regulator diaphragm for metering the fuel supplied to said port, a lever cammed to depress said diaphragm, said lever being rotatably pinned to said valve, a plurality of concentric hollow vanes extending from the proximity of said port and within said hollow air valve towards the inlet manifold, said vanes being provided with air inlet openings facing in a direction toward said air inlet, said openings being progressively further away from said port, whereby said openings may be progressively uncovered by the movement of said air valve.

9. The apparatus as recited in claim '8 wherein said hollow vanes comprise a plurality of spaced annular discs having progressively smaller inner diameters, each having a hollow cylindrical member extending from the inner circumference of a disc towards the inlet manifold and partially coextensive and coaxial with each other cylindrical member.

10. The apparatus as recited in claim 8 wherein said hollow vanes comprise a plurality of spaced annular discs having progressively smaller inner diameters, each having a hollow surface of revolution extending from the inner circumference of. a disc towards the inlet manifold and at least partially coextensive and coaxial with each other surface of revolution.

References Cited in the file of this patent UNITED STATES PATENTS 

